Device for the remote readjustment of rotary members



March 18, 1941. 2,235,216 DEVICE FOR THE immom REAIIJJUSTMENT OF ROTARY MEMBERS R. KUBERICH ETAL Filed Nov. 5, 1938 Cal/PA l/VG Patented Mar. 18, 1941 UNITED STATES PATENT orrice DEVICE FORTHE REMO'BEiREADJUS-TMENT OF. ROTARY MEMBER'S York ApplicationNovember 5, 1938, Serial No. 238,968 In Germany. November 8,' 1937.

9 Claims.

Our present invention relates. to an improvementin remote control of rotary members, especially rotatabletuning means, of implements employedin wireless. communication. For such tuning, means as condensers, variometers etc. devices have already been suggested, in .which the axle to be readjusted i rovided witha plurality of cam disks, each of. which co-operateswith a definite rest. The remote control takes place in the manner that arest. corresponding tothe desired tuning is.-moved fromthe position of rest which it normally occupies into. an operating. position in which it forms va catch for the cam diskconjugated. thereto. If, thus, after this control of the rest'has beenefiected, the driving members are started by means of an. auxiliary motor, one of the cam disks encounters the rest. and stops thereby the driving members in the desired position.

23 There are provided onone shaftupto-lZ cam disks so that a corresponding. number of wave lengths can be adjusted. Inorder topass over quickly to other wave lengths. the suggestion has already been made to make such. a set of cam disks exchangeable so as to render. it possible to substitute for a set another set, the, cam disks of which have prior thereto. been brought to the desired. relative position. It is.now. indeedpossible to pass overcomparatively quickly. to other wave lengthsflout a presupposition thereto isthat a corresponding number of, previously adjusted sets is available. This isnot always the case,

especially not with portable stations, .as, for. instance, such on flying, machines. Besides. also the weight and the space requiredplay a part in.

a certain sense, as is true also of. the fact that the driving members which is .to, beremote con-- trolled and at which the set .ofj'cam disks is tobe exchanged is noteasily accessible.

These clifficultiesare obviated, according tothe present invention, by making the rests-themselvesv continually remote-readjustable, for. which. purpose, viz. for the remotecontrol of the driving.

member, as well as for the remotecontrol of the rests, solely two selective switches areprovided.

The invention is. illustrated, diagrammatically. and by way. of example, on. the accompanying. drawing on which is shown a constructionalformv of the arrangement and combination. of parts constituting our invention, In thedrawing, l is .amotor which through gear Wheels 2, 3,.drives .a worm 4 which is. geared to a Worm wheel 5; The worm wheel 5 isseated upon ashaft 6 which by way ofa coupling device 1 drives the variable tuning means such as a rotary condenser assembly. Seated on .the shaft 6 are catch or stop levers 8., The station .detents. 9 and Hl'are pivoted about the shaft 6, and they are. retained in position upon the vfixed rings, H by. friction. The, outer portions of, the detents 9' and Ill. are in..the form of magnets which are energizedby current by way of supply bars l2, I3 10 on the rings. H. Element; is arevertive-signal (check-back signal) means-of, any-desired kind which will transmit to'indicator Hi the position ofthe" shaft 6 andthus'also the position of'the tuning means. Thecontact arrangements I5 and I6 areaotuated by axial displacement of the shaft of theworm- 4. The working position of the-worm is fixed bytwo springs I'I, I8, with suitable-biasingtension, so that the worm is retained in its 20 median position'while allowing deviation of the worm to the right or the left-hand side upon the shaft 6' being locked'as when a lever 8 hits a stop, if the motor is running. At the transmitter end, in addition to the instrument Ht for in- (heating or reading the revertive signals, there areprovided a station selector switch Hi to adjust or set the drive to the desired detent and a tumbler switch 20 for adjusting the detents.

Adjustment to a selected station or detent positionis accomplished in the following fashion: Suppose that the drive mechanism initially is in a position so that the stop lever 8"bears with spring. pressureupon the core of the energized magnet: of detent 9;. The spring pressure is due 35 to the fact that-the worm 4"has been shifted towards: the .right-han'dside so: that it occupies a position as indicated by the dash-lines. In this condition, the right-hand'spring, I8 produces the spring 0! bearing pressure of the stop lever 8. Relief of the spring I8. is prevented in this arrangement by -self-lockingof the worm- 4. The contact: bank- I5 has-been caused to assume the positionas shown by the aid-ofthe-disks 2| and 22. Contact Iii-is opened.

Totuneto another station or, in other words, inorder to cause the drive mechanismand the rotary condenser. into the position of let us say detent. ll'l,.the, station. selector switch 1.9 is turned from position 1.. to 2'.(as shown in drawing). In

the positive. pole'ofthe sourceof. current by Wayof the wiper contact is of the selector switch I9 and the line 24 to the contact bank [5, thence by way of the line 25 to a contact of the tumbler switch 29, by lines 26 to the motor I, by way of lines 27 back to another contact of the tumbler v switch 29, line 28 to another contact spring of operation proceeds further, will be caused to turn rotates conjointly with the shaft 6.

contact l5 and lines 29 back to the negative pole of the source of current supply 23. The direction of rotation of the motor I is governed by the position of the contact bank l5. In the position as shown, it will be assumed that the direction of rotation of the motor is so that the worm 4 when the motor I starts is first shifted from the position as indicated by dash-lines into the median position, thus closing contact l6 and through the latter the motor I stays in circuit. The motor circuit is now from the positive pole of the source of current 23, line 30, closed switch l6, line 3|, a contact spring of the contact l5, line 25, a contact of the tumbler switch 20, the lines 26 to the motor I, thence through the lines 21 by way of another contact of the tumbler switch 20, the line 23, another contact spring of contact [5 and lines 29 back to the negative pole of the source 23. Displacement of the worm towards the lefthand side beyond the median position is prevented by the left spring H. The biasing tension of the two springs I1, I8, is so chosen that in the median position of the worm 4 the worm wheel 5 It is only when the shaft 6 is locked in place that the tension of the spring will be surmounted and the worm be shifted to the right or the left-hand side. In other words, the shaft 6, as the setting in the sense of the arrow. By the operation of the station selector switch l9 when in position 2, the magnet of detent ID has been cut in circuit. The current then flows from the positive pole of the source 23 by way of the contact 2 of the selector switch 19, the line 32 to the busbar l2 of the ring ll, through the magnet of detent l0, through the busbar l3 and line 29 back to the negative pole of the source 23. The core of the said energized magnet is pulled inwardly and acts as a stop for the stop lever 8 associated with detent l0. As a consequence, the shaft 6 is locked in position and thus occupies the desired detent position. But since the motor and the worm continue to rotate, the latter is shifted to the lefthand side and thus by the aid of the left-hand spring I! produces the bearing pressure of the stop lever 8. The disk 2| as a result will be turned a certain angle clockwise and thus the contact bank I5 is changed in circuit. At the same time, the disk 22 which has been moved to the left opens the contact bank [5 and the motor I is disconnected. The setting operation has been thus completed.

When selecting another position by the selector switch or dial l9, the whole operation or cycle is repeated in the opposite direction of rotation. In other words, setting to any detent position may be accomplished from the left or the right; a difference in setting thus resulting may be eliminated by virtue of the fact that the stop levers 8 are given a certain amount of backlash or play corresponding to the setting difference rather than being fixedly seated upon the shaft 6.

For the adjustment of the detents 9 and I9 upon the rings ll both the selector switch I9 as well as the tumbler switch 20 must be operated. By the selector switch l9 first the detent which is to be adjusted is selected. The drive mechanism, in a way as hereinbefore described, is set to this detent position; in other words, the magnet of detent I!) in energized, the core is drawn inwardly and the corresponding stop lever 8 in th course of the revolution comes to engage against the magnet core which now protrudes. By throwing over of the tumbler switch 20, the connections between the contact banks l5 and I6 and the motor are then broken and the motor is directly switched in from the tumbler switch 29. The direction of rotation may be chosen at will by throwing over of the switch to the left or the right-hand side. Inasmuch as the supply of the current, when the motor is switched in as indicated, is effected directly by way of the tumbler switch 20, and not by way of the contact l6, no disconnection will be brought about when the worm is shifted to the right or to the left. If, then, by, the fixed stops 8 another shift of the worm shaft is prevented, the entire torque of the motor will be transmitted to the shaft 6. Hence, by the stop lever 8 which engages the protruding magnet core of detent [0, as will thus be seen, the motor torque acting at the shaft 6 will be brought to act upon the detent. The detent in question, say, detent It, will then be shifted with great force and as a result it slides on the ring H until the tumbler switch 20 has been restored to its median position. The position of the detent in question incidentally will be indicatedby the revertivesignal device Hi. If the detent has been shifted beyond the desired position, in other words, if it has been displaced too far, then the direction of rotation of motor I is altered by the tumbler switch 2|], worm 4 initially returns to its median position and thereupon turns the shaft 6 in the opposite direction to a point where the stop lever 8 comes to strike from the other side the projecting magnet core of the detent 10. By a brief tap, the detent may then be caused to assume the proper position. After the detent has been adjusted, the tumbler switch 20 is returned to its median position.

We claim:

1. In a radio receiving apparatus, an adjustable controlling element, a plurality of selectively operable means each acting upon operation to effect the movement of said element to a desired position, each of said means comprising a member of said members with respect to said element from said remote point.

2. In radio receiving apparatus provided with an adjustable controlling element, an electric motor for operating said adjustable controlling element, selectively operable means acting upon selective operation thereof to control the operation of said motor to thereby effect the movement of said adjustable controlling element to any one of several different positions, said last-named means including a plurality of individually adjustable means each serving to adjustably fix the various positions to which said adjustable controlling element may be operated throughoperation of said selectively operable means and means including an electric motor and a selectively operable switching means for adjusting any one of said individually adjustable means.

3. In radio receiving apparatus having a positionally adjustable element and an electric motor for operating said element, operable means representing a predetermined position of said element and acting upon operation thereof to effect the movement of said element through operation of said motor from any position of its adjustment to the particular predetermined position represented thereby, said operable means including an adjustable device arranged to adjustably fix said predetermined position, and means including said electric motor for adjusting said adjustable device so as to change the position of said element represented by said operable means.

4. In radio signalling apparatus, an adjustable controlling element therefor, a motor for operating said element, a plurality of selectively operable means for controlling the operation of said motor to cause it to adjust said element to any one of a predetermined number of positions, a plurality of adjustable stops one for each of said selectively operable means arranged to stop the movement of said controlling element when said motor has adjusted the element to the position determined by the actuated selectively operable means and the adjustment of the corresponding adjustable stop, means including an electric driving motor and a selectively operable switching means for adjusting any one of said adjustable stops so as to thereby change any one of the positions to which the adjustable controlling element is operated.

5. In radio signalling apparatus, an adjustable controlling element therefor, a motor for actuating said element, a selectively operable means acting upon operation to control the operation of the motor and thereby effect the movement of said controlling element and stop it in a desired position, said means including a stop adjustable relative to the controlling element so as to provide for determining the respective desired stopping position of the controlling element, electric driving means for adjusting said stop, means for controlling the operation of the selectively operable means from a remote point, and means at the remote point for controlling the operation of said electric driving means to thereby provide for changing the stopping position of the adjustable controlling element.

6. In radio signalling apparatus provided with an adjustable tuning device, a motor for actuating said tuning device, a selectively operable means acting upon operation to control the operation of the motor and thereby to effect the movement of said tuning device and to stop it in a desired position, said means including an element movable with said tuning device and acting upon a stop which is adjustable relative to the tuning device so as to provide for determining the respective desired stopping position of the tuning device, electric driving means for adjusting said stop, means for controlling the operation of the selectively operable means from a remote point,

and additional means at the remote point acting in conjunction with said other means at the remote point for controlling the operation of said electric driving means to thereby provide for changing the position at which adjustable controlling element is stopped upon the actuation of said selectively operable means.

7. In radio receivingapparatus, an adjustable controlling element, a selectively operable means acting upon operation thereof to efiect the movement of said controlling element to a predetermined position, said means including a member adjustable with respect to said element and acting to adjustably fix the position to which the controlling element is adjusted upon actuation of said operable means, means for operating said selectively operable means from a point remote from the radio receiving apparatus, and means including said last-named means and an operable switching device for selectively adjusting said adjustable member from said remote point so as to thereby change the position to which the controlling element is adjusted upon actuation of the selectively operable means.

8. In radio receiving apparatus as described in the next preceding claim, a second selectively operable means acting upon selective operation thereof to effect the movement of said controlling element to a predetermined position, said second selectively operable means including a second member adjustable with respect to the controlling element and acting to adjustably fix the position to which the controlling element is adjusted upon actuation of said second selectively operable means, means for operating said second selectively operable means from said remote point, and means including said last-named means and said operable switching device for selectively adjusting said second member from said remote point to thereby change the position to which the controlling element is operated upon actuation of said second selectively operable means.

9. In radio receiving apparatus, an adjustable controlling element, a plurality of selectively operable means acting uponselective operation thereof to effect the movement of said controlling element to any one of a predetermined number of positions, each of said means including a member adjustable with respect to said element and acting to adjustably fix the various positions to which the controlling element may be operated, means for operating said selectively operable means from a point remote fromthe radio receiving ap paratus, and means including said last-named means and an operable switching device for selectively adjusting any one of said members from said remote point.

RUDOLPH, xonnnrcn. ERNST FRICKE. 

